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Microbial Decolorization of Disperse Textile Dye Brown 21 by Enterobacter gergoviae Isolated from Textile Effluent

Author Affiliations

  • 1Department of Microbiology, Bhagwan Mahavir College of Biotechnology, Surat-394220, Gujarat, INDIA

Int. Res. J. Environment Sci., Volume 2, Issue (5), Pages 31-36, May,22 (2013)

Abstract

Decolorization of Disperse textile dye Brown 21, a very important commercial dye in textile industries was investigated. A dye decolorizing bacterium was isolated from effluent collected from a GIDC, Pandesara, Surat, India. Various physicochemical parameters like pH, temperature, carbon sources and nitrogen sources were optimized for maximum decolorization of dye. Dye decolorization was observed in the range of pH 7.0 to 10.0. Temperature ranges from 25\rC -39\rC was observed as suitable temperature for dye decolorization. The dye was decolorized more than 90% in aerobic culture conditions. The dye can be used as sole source carbon and energy for cell growth. Additional carbon source glucose increases the rate of dye decolorization. Addition of urea also has increased the rate of dye decolorization. These results suggest that isolated bacterium, Enterobacter gergoviae, is suitable for the biological treatment of dye-containing wastewater.

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